Fastening device for cooling tubes of a satellite cooler,particularly a rotary kiln satellite cooler

ABSTRACT

A fastening device for cooling tubes which are uniformly distributed circumferentially about the circumference on the outlet end of a rotary tube, particularly a rotary kiln, and which are connected with the interior of the rotary tube, wherein a dish-shaped saddle is provided at at least two points on the rotary tube sleeve for receiving a cooling tube, each saddle having a closure bracket with openings therethrough for receiving bolts. The closure bracket is preferably constructed in two parts and embraces the remaining circumference of the cooling tube not disposed within the dish-shaped saddle, the closure bracket constructed is a web shaped member and arranged on edge or upright with respect to the axis of the cooling tube.

United States Patent [191 Deussner Oct. 8, 1974 I FAS'IENING DEVICE FOR COOLING TUBES OF A SATELLITE COOLER, PARTICULARLY A ROTARY KILN SATELLITE COOLER [76] Inventor: Hubert Deussner, Buchenkampsweg l l, 506 Bensberg-Refrath, Germany 22 Filed: Aug. 8, 1973 21 Appl. No.: 386,754

[30] Foreign Application Priority Data Aug. 12, 1972 Germany 2239752 [52] US. Cl. 432/80, 432/3 [51] Int. Cl. F27b 7/38 [58] Field of Search 432/78, 80, 3

[56] References Cited UNITED STATES PATENTS 2,00l,258 5/1935 Lindhard 432/80 Primary Examiner-John J. Camby Attorney, Agent, or Firm-Hill, Gross, Simpson, Van Santen, Steadman, Chiara & Simpson [5 7] ABSTRACT A fastening device for cooling tubes which are uniformly distributed circumferentially about the circumference on the outlet end of a rotary tube, particularly a rotary kiln, and which are connected with the interior of the rotary tube, wherein a dish-shaped saddle is provided at at least two points on the rotary tube sleeve for receiving a cooling tube, each saddle having a closure bracket with openings therethrough for receiving bolts. The closure bracket is preferably constructed in two parts and embraces the remaining circumference of the cooling tube not disposed within the dish-shaped saddle, the closure bracket constructed is a web shaped member and arranged on edge or upright with respect to the axis of the cooling tube.

6 Claims, 3 Drawing Figures PATENTEDUCT 81974 sum 10$ 2 3.840.335

PATENTEDUCI 8 I974 sum 20F 22 FIG. 2

FIG. 3

FASTENING DEVICE FOR COOLING TUBES OF A SATELLITE COOLER, PARTICULARLY A ROTARY KILN SATELLITE COOLER BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a fastening device for cooling tubes which are distributed on the outlet end of a rotary tube, particularly a rotary kiln, and which are in connection with the interior of the rotary tube. More specifically, the invention relates to such constructions wherein for each cooling tube, as viewed in the axial direction of the kiln, at at least two points on the sleeve of the rotary tube a dish-shaped saddle is fixed for receiving the cooling tube and has a cooperable closure bar or bracket which embraces the remaining circumference of the cooling tube. The closure bar is preferably constructed in two parts and provided at both ends with holes therethrough for connection by means of bolts.

2. Description of the Prior Art A fastening device of the aforementioned type is known for use in a rotary kiln from the French Pat. No. 1,558,158. The so-called loose point in the known fastening device is formed by an annular, rigid holding element which receives the endof a cooling tube, the diameter of the ring being greater than the greatest possible outer diameter of the cooling tube sleeve.

The cooling tube will be shifted in the axial direction upon changes in length due to fluctuations in temperature in the annularly shaped holding element, which in a rotating kiln is facilitated due to the constant migration of the output point in the circumferential direction. If, however, the kiln is not continuously operated, for example, and for this reason can not always rotate slowly, the cooling tubes suspended directly beneath the lower side of the-rotary kiln, also on the contact point farthest removed from the kiln sleeve, lie in the annularly shaped holding element. Because of the alteration in length occurring with respect to cooling, appreciable uncontrollable frictional forces occur at these points and lead to an uncontrollably high bending stress of the annularly shaped holding element and exert thereon a particularly high tilting moment which accordingly takes effect on the kiln sleeve and may lead to deformations and breakages.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fastening device in which the difficulties described above will be overcome.

According to the invention, the foregoing object is realized through the provision of a closure bracket or bar which is constructed as a web shaped member and which is arranged on edge or upright with respect to the axis of the cooling tube. Through this configuration the forces taking effect on the fastening element in the radial direction, which are substantially introduced by means of the weight of the cooling tube may be assumed by a corresponding height of the web. On the other hand, the axial forces occurring upon utilization of the fastening device as a loose point upon changes in length occurring as a result of fluctuations in temperature are assumed by a deformation of the relatively thin web in the axial direction without the danger of the saddle construction or the kiln sleeve, respectively, ex-' periencing a deformation or breakage.

According to the invention the closure bracket has openings through each end thereof for receiving bolts, the holes having, at least in the radial direction as referred to the kiln axis, a greater dimension than in the circumferential direction. Preferably, these are elongate holes having end radii corresponding to the radii of the bolts to be received thereby. This arrangement provides the advantage that the bolt connection between the closure bracket and the saddle may be tightly tensioned in the radial direction; however, the arrangement is effectively a hinge connection with respect to axial forces, whereby the relatively small width of the web shaped closure bracket, as viewed in the axial direction of the rotary tube, has an especially advantageous effect and provides a tilting of the closure bracket as a result of changes in length of the pertaining cooling tube so that the edge pressures of the walls of the holes in the closure brackets upon the bolts extending therethrough are or may be eliminated. With this arrangement, it is ensured that the frictional forces in the axial direction engaging on the fastening device may take effect only on the saddle, and accordingly come into considerationas a lever'arm with a maximum length corresponding to'the spacing of the axis of I In accordance with a further development of the invention, cams are arranged on the outer surface of a cooling tube, the cams being in a form-locking connection with the closure bracket. With this construction it is ensured that in the outer area of the closure bracket no relative shifting may occur between the cooling tube and the closure bracket, but that upon a change in length of the cooling tube a tilting of the closure bracket with respect to the saddle is provided.

According to a further development of the invention, the saddles which are disposed adjacent each other in the circumferential direction on the rotary tube sleeve are arranged in at least two rows and are offset with re- I ing the costs upon finishing, the cooling tubes may be disposed more closely on'the rotary tube sleeve, and accordingly the circumferential diameter of the entire cooling arrangement can be decreased. This works out to particular advantage in that the structural height for the rotary tube diameters and cooling tube diameters are decreased for large'output yields. The offset arrangement of the saddles uniformly distributes the stresses which result at each saddle foot so that spatial tension peaks are prevented.

According to another aspect of the invention, it is provided that the adjacent offset saddles are connected in each case with each other in the area of the overlap by at least one web plate. This construction is substantially favorable for. the construction of the individual saddles, particularly with respect tostresses in the axial direction in that the connection of the web plates between the saddles provides an appreciable stiffening due to the resulting double-T or box-section formed by this construction. This manner of construction permits the formation of each saddle by a narrow web plate extending in the circumferential direction on the kiln tube, which is provided with a wider supporting surface solely on the contact surface with the cooling tube sleeve. Forces occurring in the axial direction are introduced practically without deformation of the saddle at the overlapping points about the rotary tube sleeve.

BRIEF DESCRIPTION OF THE DRAWINGS Other objects, features and advantages of the invention, its organization, construction and operation will be best understood by reference to the following detailed description of preferred embodiments thereof taken in conjunction with the accompanying drawings, on which:

FIG. 1 is a partial cross sectional view through a rotary kiln constructed in accordance with the principles of the present invention;

FIG. 2 is a partial longitudinal section taken generally along the line II-II of FIG. 1; and

FIG. 3 is a radially inwardly looking view of a saddle constructed in accordance with the present invention and shown with the cooling tube and closure bracket removed.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, it is apparent from the partial section of a rotary kiln with satellite coolers illustrated therein that several dish-shaped saddles 2 are fixed on the sleeve 1 of the rotary kiln adjacent each other in the circumferential direction. Each saddle 2 comprises a web shaped plate 3 which is cut out somewhat semicircularly on the side facing the cooling tube. The cut out or opening is provided with a wide supporting sheet metal 'member 4 in order to attain a wide supporting surface sufficient for the sliding movement which takes place at this point. In each case, on the ends of the semicircularly shaped cut out or opening, the saddles are provided with holes 5 extending therethrough for receiving bolts 6. The bolts 6 connect respective closure brackets 7 to the saddle. Each closure bracket 7 comprises two parts arranged to pivot about the bolts 6 and form a circular opening with the respective member 4. At least two such fastening devices are arranged consecutively as viewed in the axial direction of the rotary kiln for receiving a cooling tube 8. In this connection, one of the fastening devices, preferably that in the area of the cooling tube inlet, serves as a fixed point, while the fastening device lying behind the latter in the axial direction serves as a loose point.

In the finishing of the cooling tubes inaccuracies in the diameter thereof occur. These inaccuracies are balanced by means of a'tightener or spanner 9 arranged at the vertex or apex of the closure bracket by which the two closure bracket halves are tightly connected with each other. Adaptation to the different diameters is provided by means of intermediately positioned spacing discs 10.

Upon utilization of a fastening device as a loose point, a cam 11 is provided on each side of a respective closure bracket in the area of the tightener or spanner 9 and fixed to the respective cooling tube to provide a form-locking connection between the cooling tube and the closure bracket. With this construction provided for the loose point for the fastening of a cooling tube, a hole 12 is additionally provided at each end of each closure bracket in an elongate form so that it has a larger dimension in the radial'direction of the kiln than the diameter of the respectivebolt 6. As just mentioned, the opening or hole 12 is preferably constructed as an elongate hole, whereby the radius at each end thereof corresponds to the radius of the bolt in order to attain a support on the entire contact surface between the bolt and the hole. According to the invention, this construction causes a tilting of the closure bracket in the area of the connection with the bolts 6 (compare the arrow 18in FIG. 2) as a result of fluctuations in temperature and the locking of the cams 11 with the closure bracket. Accordingly, between the outer area of the closure bracket and the cooling tubes, no relative movement occurs and no frictional forces are established. Frictional forces derived from the rotary kiln sleeve may accordingly occur solely between the supporting surface 4 of the saddle 2 and the cooling tube sleeve 8. The tilting movement resulting from such frictional forces with respect to the kiln sleeve may accordingly have no greater lever arm than corresponds to the middle spacing h of the connection bolt to the kiln sleeve because ofthe hinged connection of the closure bracket with the saddle. The spacing h is additionally dimensionedto particular advantage so that it lies on the connecting line between each two center axis points of adjacent cooling tubes. I

In reference to FIGS. 2 and 3, it will be appreciated that the saddles each comprise a web shaped plate 3 fixed on edge or upright on the kiln sleeve and a somewhat semicircularly shaped section which carries a supporting sheet metal member 4. The support in the axial direction takes place, for example, by means of radially aligned gussets 13 and 14 disposed below the cooling tube axis. It will be appreciated that those saddles which lie adjacent each other in the circumferential direction are arranged offset in two rows and in each case overlap at their ends. According to theinvention, the web plates 3 are connected in the area of such overlaps by means of at least one web plate 15 which extends in the axial direction of the rotary tube to connect the two members 3, 3' which lie adjacent one another. Because of this, a double-T, or upon utilization of two web plates, a box-section results at the overlaps which causes an appreciable stiffening of the saddle in the axial direction and, accordingly, axial forces may be in-' troduced practically without deformation of the saddles, even in the kiln sleeve.

Upon the utilization of the fastening device as a fixed point for the cooling tube, the earns 11 in the area of the tightener or spanner 9 of the closure brackets 7 may be eliminated. In such a case, however, recesses 16 (shown in broken lines) may be provided in the supporting member 40f each saddle for engaging cams 17 (shown in broken lines) fixed on the cooling tube sleeve. With this construction at the fastening point of each cooling tube, shifts of a coolingtube in the axial direction are eliminated, as is rotation of the cooling tube in the saddle.

Although I have described my invention by reference to particular illustrative embodiments thereof, many changes and modifications of the invention may become apparent to those skilled in the art without departing from the spirit and scope of the invention. I therefore intend to include within the patent warranted hereon all such changes and modifications as may reasonably and properly-be included within the scope of my contribution to the art.

I claim:

1. A fastening device for cooling tubes which are uniformly distributed about the circumference on the outlet end of a rotary tube, at least two fastening devices provided in an axial spaced relationship for each cooling tube, said fastening device comprising: a dishshaped saddle for receiving and embracing a portion of the circumference of a cooling tube, and a web-shaped closure bracket including two parts each arranged on edge with respect to the axis of the cooling tube and loosely pivotally connected to said saddle for embracing the remaining circumference of the cooling tube.

2. A fastening device according to claim 1 wherein the pivotal connection of a closure bracket part comprises a bolt and a hole extending through the end of said bracket part in the axial direction for receiving said bolt, said hole having a greater dimension in the radial direction than the diameter of said bolt.

3. A fastening device according to claim 2 comprising cams fixed to the outer surface of the cooling tube for forming a form-locking connection with said closure bracket.

4.. A fastening device for cooling tubes which are uniformly distributed about the circumference on the outlet end of a rotary tube, at least two fastening devices provided in an axial spaced relationship for each cooling tube, said fastening device comprising: a dishshaped saddle for receiving and embracing a portion of the circumference of a cooling tube, and a web-shaped closure bracket including two parts each arranged on edge with respect to the axis of the cooling tube and pivotally connected to said saddle for embracing the remaining circumference of the cooling tube, adjacent ones of said saddles arranged offset with respect to each other in at least two rows.

5. A fastening device according to claim 4, wherein adjacent offset ones of said saddles extend circumferentially so as to overlap each other as viewed in the axial direction, and comprising at least one web plate in the area of such overlap extending in the axial direction and connecting said adjacent saddles.

6. A fastening device according to claim 4, wherein said saddles each extend circumferentially so that adjacent saddles overlap as viewed in the axial direction of the rotary tube, and wherein the pivotal connection of adjacent closure bracket parts include a common bolt extending through such adjacent parts and the overlapping portions of said adjacent saddles. 

1. A fastening device for cooling tubes which are uniformly distributed about the circumference on the outlet end of a rotary tube, at least two fastening devices provided in an axial spaced relationship for each cooling tube, said fastening device comprising: a dish-shaped saddle for receiving and embracing a portion of the circumference of a cooling tube, and a web-shaped closure bracket including two parts each arranged on edge with respect to the axis of the cooling tube and loosely pivotally connected to said saddle for embracing the remaining circumference of the cooling tube.
 2. A fastening device according to claim 1 wherein the pivotal connection of a closure bracket part comprises a bolt and a hole extending through the end of said bracket part in the axial direction for receiving said bolt, said hole having a greater dimension in the radial direction than the diameter of said bolt.
 3. A fastening device according to claim 2 comprising cams fixed to the outer surface of the cooling tube for forming a form-lOcking connection with said closure bracket.
 4. A fastening device for cooling tubes which are uniformly distributed about the circumference on the outlet end of a rotary tube, at least two fastening devices provided in an axial spaced relationship for each cooling tube, said fastening device comprising: a dish-shaped saddle for receiving and embracing a portion of the circumference of a cooling tube, and a web-shaped closure bracket including two parts each arranged on edge with respect to the axis of the cooling tube and pivotally connected to said saddle for embracing the remaining circumference of the cooling tube, adjacent ones of said saddles arranged offset with respect to each other in at least two rows.
 5. A fastening device according to claim 4, wherein adjacent offset ones of said saddles extend circumferentially so as to overlap each other as viewed in the axial direction, and comprising at least one web plate in the area of such overlap extending in the axial direction and connecting said adjacent saddles.
 6. A fastening device according to claim 4, wherein said saddles each extend circumferentially so that adjacent saddles overlap as viewed in the axial direction of the rotary tube, and wherein the pivotal connection of adjacent closure bracket parts include a common bolt extending through such adjacent parts and the overlapping portions of said adjacent saddles. 